'Baptized' in the Bible

Has Christ been divided? Paul was not crucified for you, was he? Or were you baptized in the name of Paul?

I thank God that I baptized none of you except Crispus and Gaius,

so that no one would say you were baptized in my name.

Now I did baptize also the household of Stephanas; beyond that, I do not know whether I baptized any other.

and all were baptized into Moses in the cloud and in the sea;

For by one Spirit we were all baptized into one body, whether Jews or Greeks, whether slaves or free, and we were all made to drink of one Spirit.

Otherwise, what will those do who are baptized for the dead? If the dead are not raised at all, why then are they baptized for them?